Why dont i get curves on the graph editor?
Some curves may not be visible due to their high value, or too low value.

First of, check if you see all curves by adjusting vertical zoom, with CTRL +  MMB, then drag up / down.

Also, you can check the Normalize button at the bottom toolbar of the graph editor, and all curves will be clamped between -1 and 1 so you can see them all in a more condensed area of the graph.